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Note 2 - Acquisitions and Subsidiaries and Joint Ventures with Noncontrolling Owners' Interests (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] |
Assets acquired and liabilities assumed: |  |  |
Current assets, including cash of $4,662 |  | $ | 8,839 |
Current liabilities |  |  | (5,708 | )
Working capital acquired |  |  | 3,131 |
Property and equipment |  |  | 2,018 |
Other |  |  | 9 |
Total tangible net assets acquired at fair value |  |  | 5,158 |
Goodwill |  |  | 4,803 |
Total consideration |  |  | 9,961 |
Fair value of earn-out |  |  | (2,370 | )
Cash paid, net of $409 receivable from seller |  | $ | 7,591 |
Assets acquired and liabilities assumed: |  |  |
Current assets, including cash of $654 |  | $ | 3,207 |
Current liabilities |  |  | (2,464 | )
Working capital acquired |  |  | 743 |
Property and equipment |  |  | 708 |
Debt due to noncontrolling interest owner |  |  | (500 | )
Total tangible net assets acquired at fair value |  |  | 951 |
Goodwill |  |  | 1,502 |
Total consideration |  |  | 2,453 |
Fair value of noncontrolling owners’ interest in Myers |  |  | (1,226 | )
Cash paid |  | $ | 1,227 |
Assets acquired and liabilities assumed: |  |  |
Current assets, including cash of $3,370 |  | $ | 43,053 |
Current liabilities |  |  | (31,953 | )
Working capital acquired |  |  | 11,100 |
Property and equipment |  |  | 11,212 |
Total tangible net assets acquired at fair value |  |  | 22,312 |
Goodwill |  |  | 57,513 |
Total consideration |  |  | 79,825 |
Fair value of noncontrolling owners’ interests in RLW, including put |  |  | (15,965 | )
Cash paid |  | $ | 63,860 |
Business Acquisition, Pro Forma Information [Table Text Block] |
|  | Revenues |  |  | Net Income (Loss) Attributable to Sterling Common Stockholders |
JBC actual from 8/1/2011 – 12/31/2011 |  | $ | 12,303 |  |  | $ | 245 |
Myers actual from 8/1/2011 – 12/31/2011 |  |  | 7,153 |  |  |  | 170 |
Supplemental pro forma results of the Company, JBC, and Myers on a combined basis for 1/1/2010 – 12/31/2010 (unaudited) |  |  | 475,906 |  |  |  | 19,596 |
Schedule of Changes in Noncontrolling Interests and Joint Ventures [Table Text Block] |
|  | Years Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Balance, beginning of period |  | $ | 18,375 |  |  | $ | 28,724 |  |  | $ | 23,887 |
Net income attributable to noncontrolling interest included in liabilities |  |  | 16,941 |  |  |  | 935 |  |  |  | 7,137 |
Net income attributable to noncontrolling interest included in equity |  |  | 1,068 |  |  |  | 261 |  |  |  | -- |
Accretion of interest on puts |  |  | 993 |  |  |  | 881 |  |  |  | 1,169 |
Change in fair value of RLW put/call |  |  | 3,797 |  |  |  | 1,268 |  |  |  | -- |
Change in fair value of RHB put/call |  |  | 2,473 |  |  |  | 1,054 |  |  |  | 691 |
Acquisition by Sterling of RHB noncontrolling interest |  |  | -- |  |  |  | (8,205 | ) |  |  | -- |
Noncontrolling interest associated with Myers acquisition |  |  | -- |  |  |  | 1,227 |  |  |  | -- |
Issuance of noncontrolling interest in RHB in exchange for net assets of acquired companies |  |  | 9,767 |  |  |  | -- |  |  |  | -- |
Distributions to noncontrolling interests owners |  |  | (10,185 | ) |  |  | (7,809 | ) |  |  | (4,160 | )
Acquisition by Sterling of RLW noncontrolling interest |  |  | (23,144 | ) |  |  | -- |  |  |  | -- |
Other |  |  | (39 | ) |  |  | 39 |  |  |  | -- |
Balance, end of period |  | $ | 20,046 |  |  | $ | 18,375 |  |  | $ | 28,724 |

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